What is the molality if 734 mol of lithium sulfate are dissolved to make

2500 kg of solution.

a) 0.59

b) 0.29

c) 293.6

d) 29.4

0.29 M

Explanation:

We are given;

The number of moles of Lithium sulfate as 734 mol The mass of of Lithium sulfate solution as 2500 kg

We are needed to determine the molarity of lithium sulfate solution.

We need to know that;

Molarity of a solution = Moles of the solute : Volume of the solution

Taking the density of the solution to be 1 000 kg/m³ or 1 g/cm³

Then;

Volume = Mass : density

= 2500 kg : 1000 kg/m³

= 2.5 m³

But, 1 m³ = 1000 L

Thus, volume = 2500 L

Therefore;

Molarity = 734 mol : 2500 L

= 0.2936 mol/L

= 0.29 M

Therefore, the molarity of lithium sulfate solution is 0.29 M